It was "A recreation of scenes from the 1808-1814 Peninsular War on the Iberian Peninsula between the French and allied armies under Napoleon Bonaparte, and those of Spain, Portugal and Britain"[1], while a BBC internal document desacribes it as "Complete music track for the film, mainly based on existing music."[2]

where "TMS (Television Music Studio)" seems to be the BBC Television Music Studio, Shepherds Bush, London, producing "title and incidental music for television programmes".[3]

Its tape's catalogue entry is dated December 1970, the TMS tape is dated 2nd May 1971 (presumably when the final version was complete) and Chronicle: Storm in the Peninsula was broadcast on 17 July 1971